This paper

on the basis of studying rain attenuation of Ku band microwave for satellite telecommunication systems

bravely envisages in an inverse way

to collect the weather information from this kind of atmospheric interference by making use of rain attenuation to detect rainfall in the atmosphere.The way is

turn over the processing to the positive problem that resolves the Ku wave rain attenuation

make use of the amount of Ku wave rain attenuation measured actually and the method to predict rain attenuation

calculate the rainfall rate

and obtain the total amount of liquid water through the electric wave propagation slant-path in atmosphere.On basis of this research

Ku wave band Satellite Telecommunication Systems（SaTS） will become a Ku-band passive bistatics Radar system at the same time to detect Atmospheric rainfall

and even develop the role of "the kill two birds with one stone".It has important practical meaning.Just like GPS/MET

this research would develop as SaTS/MET.Collecting the information of atmosphere

ocean

space from the interference error of other electro-magnetic waves applied technique

could find a new way thinking of and important paths for developing the remote sensing techniques

and opening up the Earth space information resources widely.